Lifting jack



G. WQWIARD 1,878219 LIFTING JACK med Nov. 1. 192e s sheets-sheet 1 sept.2o, 1932.

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G. W. WRD

LIFTING JACK Sept. 20, `1932.

3 Sheds-Sheet 2 i Filed Nav. 1, 1926 IN VEN TOR.

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Sept. 20, 1932. G. w. wlARD 1,878,219

LIRTING JACK 3 Sheets-Sheet 3 Filed NOV. l, 1926 INVENTOR.

ATTO EY.

Patented Sept. 29, 1932 PATE,

GEORGE W. JV IARD, F DETROIT, MICHIGAN, ASSIGNOR, BY DIRECT AND`IVIESN'E ASSIGN- MENTS, T0V THE-BUCKEYE JACK MANUFACTURING COMPANY, OFALLIANCE, OHIO,

A CORPORATION OF (3l-IIC` LIFTING JACK Application led November 1, 1926.Serial Ne. 145,430.

This invention relates to lifting acls, and is particularly designed forlifting one extremity of an automobile axle, asl when a punctured tireis to be removed from a vepermit the ready application of a replacementtire after the axlehas been raised. For example, when a balloon tire ofsay six inch diameter has become flat, lowering the adjacent end of thevehicle axle, it is necessary to elevate the end of the axleapproximately seven inches, and when the vehicle is resting uponl a softor rutty road it may be necessary.

to secure even further travel of the j ack-seat to compensate forunevenness in road surface vg or sinking of the jack base because of theweight of the car. One of the objects of my invention is the provisionof a jack having a comparatively low minimum height and a comparativelylong travel of the jack-seat while affording suiiicient support for thelifted member at all-heights of the j ack-seat.

Another object of my invention is the construction of a lifting j ackwith a plurality of telescoping tubular members for both lifting Tandpreventing rotation of the jack-seat during its travel.

A further object of my invention is the arrangement of a hollow threadedcylinder around a fixed spindle with provisions for adjusting theinitial position of the cylinder upon the spindle, whereby rapid roughadjustment of the jack-seat may be secured, follow-ed by a slowerV finaladjustment of the jack-seat due to the joint rotaticn of the spin dleand threaded cylinder.

Other objects and advantages will be apparent Vfrom the followingdescription, wherein reference is made to the accompanying drawingsillustrating a preferred embodiment of my invention and wherein sinr-Vtheir lowermost positions.

Fig. 2 is a similar view showing the positions assumed when thejack-seat has been elevated.

Figs. 3, 4 and 5 are detail sectional views taken respectively .on thelines 3-3, 4 4 and 5.-5 of Fig. 2.

Fig. 6 is adetail perspective view showing the vertical spindle utilizedherein.

Fig. 7 is a detail sectional view taken substantially on thepline-'-Y ofFigure 2.

Referring now to the drawings, the numeral 5 designates the jaclr base,which may be of any desired shapeA or size', and which carries the outercasing adapted to enclose the working parts of the jack. The casing 6 isherein shown as comprising an upper tubular barrel supported upon anenlarged lower compartment having a flange whereby the casing 6 may besecuredupon the base 5, as by rivets 7. A reinforcing plate 8 centrallyapertured to provide a seat for the lower race 9 of a ball bearingmayalso be secured to the base 5 by the rivets 7, orV in other desiredmanner. A circumferential series of balls 10 is adapted to restupon therace 9 and support an upper race-11 suitably arranged to rotate with ahorizontal gear 12, fixed upon the lowerfreduced extremity 13a of thevertical Vspindle 13 (note Fig. The gear 12 meshes with a pinion 14 journaled in a bears ing 15 carried by the enlarged lower portion of thecasing 6 and adaptedV to be suitably` connected with a junction member16 whereby a handle of appropriate length and design may be readilysecured. This arrangement of parts enables the rotation of the verticalspindle 13 whenever the pinion 14 is rotated in either direction, andany desired speed of rotation of the spindle may be secured by varyingthe number of teeth upon the pinionv 14 and gear 12. To enable theretention of suitable lubricant around the ball bearing and gear 12, Ipreferably provide a cover plate 17 above the gear 12 adapted tosubstanacll tially close the space around the gear and ball bearingexcept for a slot 17aM for the admission of the pinion 14. rllhe ballbearing and gear can then be packed with solid or semi- 5 solidlubricant, which will be retained below the cover plate 17 forindeiinite periods.

rllhe spindle 1.3 is suitably 'formed with a plurality of spaced bayonetslots 13b with their upper portions opening into an elongatedvertical'groove 130 (note Figs. 1 and 6). These bayonet slots areadapted to receive inwardly extending diametrically opposed pins 18carried by the hollow externally screw threaded cylinder-19, and when.the pins 18 are-seated within any of the bayonet slots.

13b the hollow screw 19 will be rotated simultaneously with the spindle13. However, the construction permits the adjustment of thev initialposition oi1 the hollow screw 19 2.03 upon the spindle 13 preparatory tothe simultaneous rotation oii such members, whereby itis possible tolquickly adjust the jack-seat hereinafter referred to, by a direct manualmovement so that the seat will almost touch 25. the part to be raised,whereupon the spindle and hollow screw may be rotated to bring the vjack-seat into engagement with the member to be lifted, and upon furtherturning movement to'lift such member to the desired 3? height'.

The hollow screw 19 threads into the traveler nut 20 fitted into oneextremity of the inner tubular member 21 Vwhich at its upper Xtremitycarries the jack-seat 22 (note 351)..` The linner tubular member 21 isnormally held against rotation, as hereinafter described, and therotation ofthe hollow screw 19 will serve to vertically move thetraveler nut 20 and attached parts according to the direction ofrotation of the screw. Partial rotation of the inner tubular member 21together with the hollow screw 19 is permitted, however, to enable theadjustment of the screw 19 upon the spindle13. To this `end a horizontalslot 21L is formed in the periphery of the hollow tubular member 21 andreceives the inner portion of a. pin 28, the outer portion of whichpasses through the elongated vertical slot 24a inthe intermediatetubular member 24: (note Figs. 1 and 2). The pin 23 is headed at itsouter por tion to prevent its accidental passing through the slot 24a,and receives a cotter pin or the like at its inner extremity to preventit from :accidentally slipping through the horizontal slot 21a. Byvirtue of this construction the jack-seat 22 may be grasped and raisedto first elevate the pins 18 to the uppermost portions of the bayonetslots 13b wherein they then rest, and then turned to bring the pins 18out of such bayonet slots and into the ver tical slots 13C connectingthe several bayonet slots. During such raising movement the pin 23 movesvertically in the elongated slot 24a of the intermediate tubular member2li,

while on such rotative movement the inner tubular member 21 movesrelatively to the pin 23 because 01" the horizontal slot 21a. rEhen thejack-seat and attached parts may be elevateduor lowered as desired toany desired bayonet .slot 13", whereupon it is reversely rotated tobring the pins 18 into the upper horizontal portions of the desiredbayonet slots and then lowered into the vertical seats o1" such bayonetslots. ,Y

The spindle 1.3 may then be rotated through the gears 12 and 14C to turnthe hollow screw 19 in the desired direction, the movement of the screw19 serving toeadvance or retract the traveler nut 2O together with theinner tubular member 21 and jack-seat 22.Y The pin 28 moves verticallywithin the elongated slot 24a in the intermediate tubular member '24until it contacts the upper wall of such slot, whereupon. further upwardtravel of the inner tubular member 21 will serve to also rais0 theintermediate member 24e. Rotation of the intermediate member 24 isprevented by the pin 25 secured in the casing 6` and iitting within theelongated vertical slot 21B in the intermediate member 24C (note Fig.2). e Y

When it is desired to again lower the jackseat it is only necessary toturnv the pinion 14 in the reverse direction, the rotation of theVhollow screw 19 serving to simultaneously lower the inner tubular member21 and intermediate tubular member 24: until the pin 25V in the outercasing engages the upper wall of the slot 24, whereupon the innertubular member 21 only travels, its pin 23 moving within the elongatedslot 24a. rlhe simplicity and practicability of my improved-jack isbelieved to be apparent. The hollow screw 19 is positively driven ineither direction through the vertical spindle 18, and the rotation ofthe screw serves to directly advance or retract the traveler nut 20 andthe jackseat securely attached thereto.v VThe supporting members arepreferably tubular in shape and give great strength with comparativelylittle weight. Moreover, initial adjustment of the jack-seat to anydesired height can be readily effected.

TWhile it will be apparent that the illus* trated embodiment of myinventionherein disclosed is well calculated to adequately fulfill theobjects and advantages primarily stated, it is to be understood that theinvention is susceptible to variation, modification and change withinthe spirit and scope of the subj'oined claims.

lHaving described my invention,

1. A. device of the characterV described including a tubular outercasing,a tubular inner member adapted to telescope therein,

and'connected thereto fer partial rotation relatively to the casing, atravelernutand j jack-seat carried by the inner member, Va hollow screwthreaded in the nut, a vertical l claim l spindle extending into saidhollow screw, means for driving said spindle, and means for adjustablyconnecting the spindle and screw for simultaneous rotation.

2. A device of the character described including a tubular` outercasing, a tubular inner member adapted to telescope therein, andconnected thereto for partial rotation relatively to the casing, atraveler nut and jack-seat carried by the inner member, a-

seat carried by the inner member, a hollow screw threaded in the nut, avertical spindle extending into said hollow screw, means for drivingsaid spindle, and means for adjustably connecting the spindle and screwfor simultaneous rotation, including inwardly directed pins carried bysaid screw and spaced projections on the spindle adapted to engage saidpins.

4. A jack including a base, a tubular casing having' an enlarged lowerportion, a horizontal gear journaled in said enlarged lower portion,means for driving said gear extending through the casing, a verticalspindle fixed centrally of said gear and having a plurality ofbayonetslots therein, a hollow screw surrounding said spindle andcarrying a radial pin adapted to enter any of said bayonet slots, atraveler nut threaded upon said screw, an inner member secured upon saidtraveler nut and carrying a jack-seat, and connections between the innermember and casing whereby said inner member may be partially rotatedrelatively to said casing.

5. A jack including a base, a tubular casing having an enlarged lowerportion, a hori- Zontal gear journaled in said enlarged lower portion,means for driving said gear eX- tending through the casing, a verticalspindle lixed centrally of said gear and having a plurality of bayonetslots therein, a hollow screw surrounding said spindle and carrying aradial pin adapted to enter any of said bayonet slots, a traveler nutthreaded upon said screw, an inner member secured upon said traveler nutand carrying a jack-seat, an intermediate member arranged between saidinner member and the upper portion of said casing, and connectionsbetween the 5 inner member and casing whereby said inner member may `bevpartiallyv rotated relatively tosaid intermediate member. f l 6.- 1Ajackincluding a base,a tubular casingf having an enlargedlower portion,ahori-4 zontalgearjournaled in said enlarged lowerwo portion, means fordriving said gear extending through the casing, a vertical spindle fixedcentrally of said gear and having a plurality of aligned pairs ofbayonet slots therein,a hollowJ screw surrounding said spindle ,75andfcarrying a pair of diametrically opposed radial pins adapted toenter any of said pairs of bayonet slots, a traveler nut threaded uponsaid screw, an innermember secured upon said traveler nut and carrying ajack-seat,

and connections Vbetween the inner member and casingwhereby said innermember may be partially rotated relatively to said casing.

V7. A jack' includingv a base, a tubular casing having anenlargedy lowerportion, a horizontal gear journaled in said enlarged lower portion,means for driving said gear extending through the casing, a verticalspindle fixed centrally of said gear and having a plurality of alignedpairs of bayonet slots therein, a 90 hollow screw surrounding saidspindle and carrying a pair of diametrically opposed ra-V dial pinsadapted to enter any of said pairs of bayonet slots, a traveler nutthreaded upon said screw, an inner member secured vupon said travelernut and carrying a jack-seat, an intermediate member arranged betweensaid inner lmember and the Lipper portion of said casing, andconnections between the inner member and casing whereby said inner mem-10g ber mav be partially rotated relatively to said intermediate member.

8. In a jack, a tubular outer casing carrying an inwardly extendingradial pin", an interf mediate tubular member adapted to telescopeAwithin the outer casing and having a pair of longitudinal slots therein,one of which slots receives said radial pin oit' the outer casing, aninner tubular member adapted to telescope within said intermediatelmember and having no a horizontal slot formed in its periphery, a pinloosely mounted in said horizontalslot of the` inner member and one ofthe longitudinal slots of the intermediate member, a

traveler nut and jack-'seat carried by said 115 inner member, a hollowscrew threaded within the traveler nut, a vertical spindle extendingwithin said hollow screw, means for adjustably connecting the spindleand screw for simultaneous rotation, and means for driving the spindle.

9. lIn a jack, a tubular outer casing carrying an inwardly extendingradial pin, an intermediate tubular member adapted to telescope withinthe outer casing and having a pair of longitudinal slots therein, one ofwhich slots receives said radial pin of the outer casing, an innertubular member adapted to telescope within said intermediate member andhaving a horizontal slot formed in 13e the periphery, a pin looselymountedin said' horizontal slot of the inner member and one of thelongitudinal slots of the intermediate, member, a traveler nut andjack-seat carried by said inner member, a hollow screw threaded withinthe traveler nut, a vertical spindle extending within said hollow screw,means for adjustably connecting the spindle and screw for simultaneousrotation, means for driving the spindle, including a horizontal gearfixed upon the spindle, a pinion journaled inthe casing and meshing withsaid gear, and means for rotating said pinion.

lO. In a jack, a vertical spindle 'having a r vertical peripheralslot-therein and a plural-V ity of spaced bayonet slots opening intosaid vertical slot, means forrotating said spindle in either direction,ahollow screw threaded cylinder arranged over the spindle and having aninwardly extending radial pin adapted to iit in any of said slots in thespindle, a traveler nut threaded upon said cylinder, an innertelescoping member secured to the traveler nut and carrying a jack-seat,an outer telescoping member surrounding said inner member, a casingexterior of said Outer member and connections between the inner memberand casing whereby said inner member may be partially rotated relativeto said outer member. Y y

11. A device of the character described including a tubular outercasing, a tubular inner member and an intermediate tubular memberadapted to telescope therein and slidably but non-rotatably connected tothe outer casing, and Iconnection between the intermediate and innertubular members adapted to permit partial rotation vof the latterrelatively to the casing, said connection comprising a pin cariried byone member and a cooperating slot formed in the other, a traveler nutand ackseat carried by the inner member, a hollow screw threaded in thenut, a vertical spindle extending into said hollow screw, means for j.driving said spindle, and means for adjustf ably connecting the spindleand screw for simultaneous rotation.

' In witness whereof I hereunto set my hand.

GEORGE W. WIARD.

